Diseases and Management of Crops under Protected Cultivation
Diseases and Management of Crops under Protected Cultivation
Diseases and Management of Crops under Protected Cultivation
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(<strong>Diseases</strong> <strong>and</strong> <strong>Management</strong> <strong>of</strong> <strong>Crops</strong> <strong>under</strong> <strong>Protected</strong> <strong>Cultivation</strong>)<br />
highly pr<strong>of</strong>itable<br />
Causes for GH Failure / Damage<br />
• The pr<strong>of</strong>ile used in the GH frame, trusses <strong>and</strong> other member too light which deformed by<br />
wind<br />
• Cladding material some time appeared to be stronger than structure<br />
• Poly film tearing because <strong>of</strong> rough <strong>and</strong> sharp edge <strong>of</strong> the frame<br />
• The foundation not sufficiently secured against uplift forces<br />
• Damage <strong>of</strong> polyfilm <strong>of</strong>ten started from the ventilation openings<br />
General Considerations for the Planning <strong>and</strong> Construction <strong>of</strong> Green House<br />
• A polyhouse is designed to withst<strong>and</strong> local wind, snow <strong>and</strong> crop loads for a specific<br />
cropping activity.<br />
• In this way the structure becomes location <strong>and</strong> crop specific.<br />
• The design <strong>of</strong> a polyhouse structure also depends on the covering material to be used.<br />
• A glass house, for example requires heavier structures to support the weight <strong>of</strong> glass in<br />
addition to other external loads.<br />
• A polyhouse structure should admit adequate quantity <strong>of</strong> sunlight for crop production in<br />
addition to the structure being adequately strong.<br />
• At the same time, the structure should require minimum energy for maintaining desirable<br />
crop microclimate.<br />
• The greenhouse design, thus, must be energy conserving while maintaining adequate<br />
transparency to solar energy.<br />
• Local climate <strong>and</strong> local materials must be taken into account to arrive at the most<br />
appropriate greenhouse design.<br />
Wind<br />
Wind Break on north side<br />
Pesticide<br />
storage<br />
Growing media<br />
storage<br />
Equipment<br />
storage<br />
Break<br />
on<br />
Future<br />
Expansion<br />
Production Area<br />
Future<br />
Expansion<br />
West<br />
side<br />
Office Employ lounge Sale area<br />
Road on south side<br />
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